It's serial number is XD13231. (seat lug, left side) There's a flip top oiler (nickel plate?) on the bottom left side. I forgot that it was called a Falcon. Hercs top racer of the day was the Kestrel so this fits with the theme.This is not that level of bike. I believe Herecules used Accles and Pollack tubes back in the day and were pinned and lugged. The lugwork is crude but clean enough. I've seen a 1930-ish Herc racer with track ends and braze on for a Cyclo 3 speed derailleur fore of the axle. The angles were much slacker as well. This Falcon and it's "Herailleur/Synchro" gear is rare. I once read it's the first indexed derailleur ever made...can anyone with The Dancing Chain confirm that? By the time it came out, cyclo had a 4 speed Benelux on the market and that was the end of further gear development. As noted earlier, most "racers" came equipped with Herc and SA hub gears.